Oil-impregnated sintered bearing and method of producing the same

• Main Author: MARUYAMA TSUNEO,SHIMIZU TERUO
• Format: Patent
• Language: English
• Published: 03.05.2006
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a sintered oil retaining bearing capable of obtaining high durability without damaging a rotary shaft and the bearing itself even though the rotary shaft is inclined inside the bearing by receiving large shearing load. SOLUTION: The sintered oil retaining bearing has a bearing hole 3 with a circular cross section supporting the rotary shaft 2 on a bearing body 1 made of sintered metal. The bearing hole 3 is provided with a shaft supporting portion 3a with a uniform diameter having the inside of the bearing hole 3 functioning as a frictional surface and tapered enlarged diameter portions 3b and 3c formed continuously with the shaft supporting portion 3a and arranged on both sides of the bearing hole 3 at an axial direction by enlarging its diameter outwardly. The distance between a straight line L1a extending an inclined surface of one enlarged diameter portion 3b and a straight line L1b extending an inclined surface of the other enlarged diameter portion 3c being opposite with the inclined surface of one enlarged diameter portion 3b while sandwiching the center of the bearing body 1 is roughly equal to the diameter D of the rotary shaft 2. COPYRIGHT: (C)2005,JPO&NCIPI